epäpuhtaissa

Epäpuhtaissa is a Finnish word-form meaning “in impurities” or “in impure conditions.” It is the inessive plural form that can modify nouns to indicate a state in which impurities are present. The form arises from the base tied to puhtaus (purity) with the negating prefix ep- (epä-), combined with the inessive suffix -issa. In practice, epäpuhtaissa can describe environments, substances, or data that contain impurities or contamination.

Usage of the form is common in technical writing, science, journalism, and literature when discussing contamination, adulteration, or impurity. It frequently appears in phrases such as epäpuhtaissa olosuhteissa (in impure conditions) or epäpuhtaissa aineissa (in impure substances). The word is a standard inflected form in Finnish grammar rather than a specialized jargon term; its exact meaning derives from the noun or adjective it modifies. Related terms include epäpuhtaus (impurity) and epäpuhtainen (impure).